P1252 = BMW code 4191 Charge air pressure actuator - Short circuit to ground.
it would seem that you have turbo pressure control fault
p1252. this is related to the inlet manifold swirl flaps are sticking
this is more than likely causing the first code this will need the inlet manifold striping and either clean or replace the flaps.
thanks for the reply.
can you test the boost control valve?
check the small vacuum pipes.
well i am at a loss on this i will opt out and repost the question and hopefully another tech can offer you some advice.
good luck regards rob
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